Contributo alla conoscenza dei Coleotteri degli ambienti acquatici della Toscana (Italia Centrale). V. Aggiornamenti: Hydraenidae (Coleoptera)

Contribution to the knowledge of the aquatic beetles from Tuscany (Central Italy). V. Updates: Hydraenidae (Coleoptera). An update of the previous contribution (Rocchi et al., 1999) on the presence in Tuscany of the family Hydraenidae is given. The list includes 75 species belonging to 4 genera: Hydraena Kugelann,1794 (27 species), Limnebius Leach, 1815 (11 species), Aulacochthebius Kuwert, 1887 (1 species), and Ochthebius Leach, 1815 (36 species)